Adhesive applying device



March 29, 1932. E. P. EVERETT ADHESIVE APPLYING DEVICE Filed June 6,1928 ATTORNEY Patented Mar. 29, 1932 UNITED STATES PATENT OFFICE ERNESTP. EVERETT, OF YONKERS, NEW YORK ADHESIVE APPLYING DEVICE Applicationfiled June 6, 1928. Serial No. 283,218.

The present invention relates to an adhesive applying device, and hasparticular application to the construction or formation of the rollsthereof which contact with or receive a liquid adhesive.

In the application of adhesive to paper and other materials, as in themanufacture of containers or receptacles, such as boxes, barrels, tubsand the like, trouble is frequently I experienced in adhesive drying orcrystallizing on the rolls, particularly where suchrolls are constructedof metal or wood. Especially is this so, in the use of sodium silicateadhesive, for if such an adhesive be allowed to harden on metal rolls,for example, it is exceedingly difiicult, if not a practicalimpossibility to clean or scrape the rolls paper to tear and gum up, andthis trouble is especially incident in machines for sealing fibre boxflaps.

It is therefore my purpdse, with the present invention, to so constructthose rolls of machines using liquid adhesive, that the trouble incidentto the adhesive, particularly sodium silicate, crystallizing on therolls is eliminated, forthe reason that the structure and composition ofthe rolls permits such crystallized adhesive to be quickly and easilyremoved from the roll, leaving the same in condition as when new. Thusmachines equipped with my rolls can use a much cheaper adhesive than ispossible with the present metal ings in detail, and particularly to igs.1 and 9 2 thereof, the letter A indicates my improved or other rolls. a

A further object of the invention is to provide, in such machines, aroll head of a composition embracing, in general, a hard cementitioussubstance, or a fibrous material im- 5 pregnated or coated with such asubstance when the roll is complete or in working condition. There aremany such composite fibrous materials to be had in the open market, andfor this purpose I prefer to use a roll made up of fibrous material suchas paper, cardboard, fabric, or comminuted' filling materials, such assawdust, wood flour or the like, the selected fibrous material havingincorporated therewith a suitable cemen- -titious substance, such assynthetic resinous material, vulcanized rubber compositions, and thelike, and the working surface of the roll itself is preferably formedwith a smooth, hard coating of the cementitious material.

For the purpose of illustration we may consider the present roll orcomprising a cylindrical surface of a phenolic condensation product, andspecifically, as formed from a tube'of fibre composition composed ofsuitable fibrous material having incorporated therewith a hard, snthetic resinous material,

in the nature of a p enolic condensation prod uct formed by the reactionof phenol and formaldehyde.

With the above recited objects and others 7 of a similar nature in view,my invention consists in the construction, combination and arrangementof parts set forth in and falling within the scope of the appendedclaims.

In the accompanying drawings- Fig. 1 is a cross sectional view of a rollembodying my invention.

Fig. 2 is a cross sectional view taken on the line 22 of Fig. 1 lookingin the direction of the arrows.

Fig. 3 is a cross sectional view through a pair of my adhesive applyingrolls in association with a pan or receptacle containing an adhesive,such as sodium silicate.

Fig. 4 is' a cross sectional view taken 90 through the pressure rolls ofa machine for laminating fibrous sheets which have been coated with anadhesive. 1

Referring now to the accompan ing drawroll as an entirety, the same beinmounted upon the usual shaft B. .The roll itself comrisestheend blocksor heads 1, which may e formed of any suitable material, preferablymetal, and are recessed as at 2 to reduce the weight of the same. Theseends or heads are provided with central bores 3 for the passage of theshaft B. The ends or heads are circular in contour and have mountedthereon the roll 4 which, as heretofore stated, is formed of a suitablefibrous material having incorporated or thoroughly mixed therewith aceinentitious substance, as synthetic resinous material in the nature ofa phenolic condensation product indicated by the dots and dashes, asshown at 5. The working surface (S of the roll has also preferablyapplied thereto a relatively thin, smooth coating of the hard, phenoliccondensation product. This surface coating may be in the nature of aseparately applied coating, or may result from exuding material pressedduring the molding or formation of the roll.

In the case of articles formed from fibrous compositions made withsynthetic resins in the nature of phenolic condensation products, itwill be understood that the synthetic resin is incorporated with thefibre in a fusible, flowing condition, either as a liquid or paper,

and then under the action of heat and pressure, as in molding thearticle, the synthetic resin will assume a hard, substantially infusiblecondition, and in such instances sutficient of the synthetic resin willexude to the surface and will be molded to form a smooth, hard, acid andwear-resisting surface.

The fibre composition roll 5 is mounted in any suitable manner upon thehead or ends 1, as conventionally illustrated in Fig. 1.

In Fig. 3 the letter C indicates a pan or receptacle containing a liquidadhesive, such as sodium silicate shown at D, and in this instance therolls A and A constructed similar to the roll A shown in Fig. 2 aremounted one above the other, the roll A acting as a distributing rolland taking the adhesive from the pan and transferring it to the adhesiveapplying roll A which appliesthe same to the paper web E,'which is toreceive the adhesive, and which paper web or sheet is held in contactwith the roll A by the guide rolls 7.

It will further be understood thatit may be desirable to form otherrolls of themachine of such a composite fibre, that is to say, thoserolls which come into contact with material to which adhesive has justbeen applied, and which adhesive is fresh and sticky. For example, inFig. l, I have shown two sets of pressure rolls A, which are used topress or form a laminated fibre board F from a plurality of sheets ofpaper or cardboard which have had an adhesive, such as sodium silicateapplied thereto.

From the foregoing description it will be understood that the purposeand aim of the invention is to provide rolls either for applyingadhesive, or which may work upon materials to which adhesive had beenapplied, and which rolls are so constructed or constituted that certainkinds of adhesive, such as sodium silicate, may be easily removedtherefrom without damaging or injuring the surface of the roll. In otherwords, any adhesive hardening or crystallizing on the roll, may beeasily and instantly peeled or wiped or otherwise removed therefrom,thus eliminating the disadvantage incident to an adhesive, such assodium silicate permanently adhering to metal rolls now generally inuse.

WVhile I have herein shown and described one particular embodiment of myinvention, I wish it to be understood that it is not limited in itsuseful application to all the details herein set forth by way ofillustration, as modification and variation may be made withoutdeparting from the spirit of the invention or exceeding the scope of theappended claims.

What I claim is:

1. An adhesive receiving roll comprising a molded tubular body portioncomposed of fibrous material having a hard and set infusible phenoliccondensation product mixed therewith, the working surface of said rollcomprising a hard and set coating of infusible phenolic condensationproduct material allowing the ready removal of adhesive therefrom.

2. A glue roll for applying an adhesive to a moving web, the workingsurface of said roll comprising a hard and set phenolic condensationproduct.

3. A distributing roll for distributing adhesive from a body of theadhesive to a glue roll, the working surface of said distributing rollcomprising a hard and set phenolic condensation product.

4. A pressure roll for operating on material to which an adhesive hasbeen freshly applied, the working surface of said roll comprising a hardand set phenolic condensation product.

5. A roller for use in machines operating upon material to which anadhesive is being applied, said roller comprising a cylindrical workingsurface made of a phenolic condensation product permitting the readyremoval of adhesive therefrom.

6. A roller for use in machines operating upon material to which anadhesive is being applied, said roller comprising a cylindrical memberthe working surface of which is made of a phenolic condensation productpermitting the ready removal of adhesive therefrom, a shaft, and meansmounting said cylindrical member in concentric relation to the shaft.

7. The combination with a moving Web and a body of sodium silicateadhesive, of means to continuously apply said adhesive to the webincluding a glue roll, the working surface of which comprises a phenoliccondensation product.

8. The combination with a moving web and a body of sodium silicateadhesive, of means

